Film-mounting



C. 0. SIMPSON.

FILM MOUNTING.

APPLICATION FILED JULY12,1920.

1,331, 74, Patented June 14, 1921.

v In vc 2273?)? Glam/ace Q 62 9650"! vused comprises an opaque card having PATENT OFFICE.

CLARENCE 0. SIMPSON, OF ST. LOUIS, MISSOURI.

FILM-MOUNTING.

Specification of Letters Patent.

Patented June 14, 1921.

Application filed July 12, 1920. Serial No. 395,661.

ToaZZ whom it may concern:

Be it known that I, CLARENCE 0. SIMP- SON, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful Improvements in Film-Mountings, of which the following is a V specification.

Thisinvention relates to the mounting of translucent films, popularly known as X-ray films or radiographs which are usually used by physicians and dentists in order to disclose anatomical conditions existing in parts of ones body. It is customary to mount suchvfilms upon a card which permits the film to be viewed as a transparency, that is to say, the film is viewed by means of transmitted light. A mount for this purpose has been in use which consists of a translucent card carrying means for holding the film on the face of the card. The film is then viewed by the aid of light transmitted through the material of the card as well as through the film itself. Hence, if the entire mount is held up to the light the largest amount of light passing to the eye of the observer is transmitted through the area of the card lying around thefilm; the effect of this is to reduce the relative illumination of the film and this reduction of illumination is not only due to the light which passes through the area around the film, but it is also due to the reduction of light passing through the film. due to the presence of the material of the mount.

Another type of mount which has been an opening in it at which the film is held, the

film being held in place by means of a translucent sheet having tabs or flaps upon it which are inserted through openings or slits punched in the card. In this type of mount, the flaps or tabs of the translucent sheet are inserted in the slits of the card with considerable difliculty. This matter is of considerable importance when it is considered that a card will frequently carry twelve or fourteen small films. Another type of mount has been used which is an opaque card with an opening-through it, the edge of the opening being scalloped; the film is secured in the opening by threading its edges alternately under and over the projecting por-. tions of the scalloped edge. This is a very tedious operation, especially where the mount carries a great number of films.

Furthermore, in practice the films frequently have a relatively light transparent margin around them and if such films are mounted in an opening with a scalloped edge as described, transmitted light will come to the observers eye through the transparent margin of the film through the notches or spaces between the projections of the scalloped edge. The light transmitted at these points detracts from the relative illumination of the body of the film where the picture appears.

The general object of the present invention 1s to overcome these difiicultiesand to provide a mount carrying films, the mount and films being so related to each other as to enable the films to be very readily attached to the mount at the openings and en abhng the mount and the film to cooperate in such a way as to exclude all transmitted l1ght except through the body of the film; a further object is to provide for preventing any possibility of transmittinglight through the transparent margin of a film in case the film to be mounted has such a margin.

Further objects of the invention will oppear hereinafter.

The invention consists in the novel features, and in the general combination of parts to be particularly described hereinafter, all of which contribute to produce a simple and efiicient film mounting. A preferred embodiment of my invention will be particularly described in the following specification, while the broad scope of my invention will be pointed out in the appended claims.

In the drawing,

Figure 1 is a view illustrating my invention and showing a pair of films carried by the same mounting card;

Fig. 2 is a View showing one of the films detached from the card;

Fig. 3. is a view showing the other film detached from the card and illustrating the character of the transparent margin which is frequently carried by such a film; and

Fig. 4 is a view showing a portion of the mounting card to illustrate the opening for the film, the film having been removed.

In carrying out my invention I provide a mounting card 1 which may be provided with a plurality of openings in which the different films are to be attached. Such a card may carry as many openings as desired; in the present instance, for the purpose of illustration, I'have shown a mounting card with two openings 2 and 3. The card. 1 is preferably formed of opaque celluloid and the face of the card on which the films are attached has a specially prepared surface adapted to receive entries in pencil referring to the different films.

(See Fig. 4-). In order to provide means for securing a film, such as the film et in this opening, I provide the edges 5 of the opening with tongues 6 which project across the edges 5, that is to say, the side edges 7 of the tongues extend outwardly past the side edges of the openings.

The film, such as the film at is then secured in the opening 2 by superposing it over the opening. (See Fig. 1). However, the opening 2 and the film with which it cooperates are so related to each other that the film is slightly larger than the opening, that is, it is of greater length and greater width, and hence when the film is applied I as illustrated, the edge 8 of the film lies farther out or beyond the edge 5 of the op'ening; in other words, the edges of the film and the opening overlap each other, the reentrant side edges? of the tongues permitting the film to be applied in this way. These tongues project over the edges of the film toward the central portion of the film and effectively engage and retain the film on the face of the card.

In practice, I find it only necessary 'to provide one. of these tongues 6 corresponding to each edge 5, although if desired, two or more of these tonguesmay be provided for mounting larger films.

As suggested above, it frequently happens thatin producing these films, a transparent margin is formed around thebody portion of the film which carries the picture. In Fig. 8, the reference numeral 9 indicates a film carrying a transparent margin 9. If such a film is mounted in an opening in such a way that the light is transmitted through the transparent margin, such transmitted light seriously interferes with the clearness of the body ofthe film. My invention is especially useful for mounting a film of this character, for the reason that the transparent margin 9 is overlapped by the edge 10 of the opening, such as'the opening 3 in Fig. 1. In Fig. 3 the body portion of the picture is represented by stippling,'

When my invention is applied to this type of film, that is to say, a film having a transparent margin, 1' do not limit myself .to any particular means for securing the Each opening. through the card is entirely unobstructed.v

film in place. Any suitable means may 'be used for that purpose which will operate to hold the translucent film in such a way that its transparent border or margin 9 is effectively overlapped by the edge of the opening. 7

It will be evident that in practising my invention, the films may be very easily attached to the cards; this operation is a very simple one indeed, as it merely necessitates the tucking of each edge of the film under its corresponding tongue. Films mounted as described, are also protected by the cards if carried in packs because the tongues prevent the films from being rubbed on one side, and the card prevents their being touched by an adjacent card on the other side. Ifthe card mounts are made of the material described, they will be very durable and can be used again and again for films,

' and furthermore on account of the prepared surface of the card a notation may be made in pencil describing the character of the evident that the mount in no way obscures the details of the picture carried by the film from being seen by the aid of the transmitted light. Films mounted on cards as described may be held up to the sky or held so as to transmit light refiected from a white sheet. In either case, light passing to the film is a diffused light which is most effective in bringing out the contrasts of light and shade in the film. 7

It is understood that the embodiment of the invention described herein is only one of the many embodiments my invention may take, and I do not wish to be limited in the practice of my invention nor in my claims, to the particular embodiment set forth.

That I claim is: 1. A mount consisting of asheet of opaque material having an unobstructed opening therein, in combination with a translucent film of greater width and greater length than the opening and superposed over the same, with the edges of the film lying farther out than the edges of the opening, and tongues carried by the opaque sheet and projecting across the edge of the opening, the

.side edges of the tongues extending outover the opening with its edges lying sub stantially parallel with and farther out than the edges of the opening, tongues integral with the opaque sheet and projecting across the edge of the openin tolengage and retain the film, the side filges of said tongues extending toward the outer edge of the mount past the side edges of the opening thereby forming slits at the edges of the opening to receive the side edges of the film.

3. A mount I consisting of a sheet of opaque material having an unobstructed opening therein, in combination with a translucent film having a transparent margin around its edge, said film being of greater width and greater length than the opening and superposed over the same with the transparent edges of the film lying farther out than the edges of the opening, said opaque sheet having means at the edge of said open ing for engaging the edge of the film to retam the same.

4. A mount consisting of a sheet of opaque celluloid having an unobstructed opening therein, in combination with a translucent film of greater width and greater length than the openings, and superposed over the same with its edges lying farther out than the edges of the opening, tongues integral with the opaque sheet with slits at their sides projecting across the edge of the opening to engage and retain the film, said sheet having a prepared face on the side from which the films are viewed, adapted to receive memoranda relating to the films mounted on the sheet.

In testimony whereof, I have hereunto set In hand.

y CLARENCE O. SIMPSON. 

